使用图像 Laravel 更新 CRUD

Question

我正在尝试更新已保存的记录，其中包括数据库中的图像和图像路径。当我更新记录时，图像被上传并且重定向工作并显示成功消息，但是，数据库中的所有列都没有更新为新数据。为什么会这样？？

这是我的更新方法：

public function update(Request $request, $id)
    {

        if ($request['post_image'] != '') {

            $request->validate([
            'title' => 'required',
            'description' => 'required',
            'slug' => 'required',
            'message' => 'required',
            'user' => 'required',
            'post_image' => 'image|mimes:jpeg,png,jpg,gif|max:2048'
            ]);

            $image_path = Storage::disk('public')->putFile('uploads/images', $request->file('post_image'));
            $request['image_path'] = $image_path;

        }else{

            $request->validate([
                'title' => 'required',
                'description' => 'required',
                'slug' => 'required',
                'message' => 'required',
                'user' => 'required'
                ]);
        }  

        $update = [
            'title' =>$request->title,
            'description' =>$request->description,
            'slug' =>$request->slug,
            'message' =>$request->message,
            'user' =>$request->user,
            'post_image' =>$request->image_path];

        Post::where('id', $id)->update($update);

        return Redirect::to('admin')->with('success','Great! Post updated successfully');

    }

这里是视图：

<form action="{{ route('blog.update', $post_info->slug) }}" method="POST" name="edit_post" role="form" enctype="multipart/form-data">
{{ csrf_field() }}
@method('PATCH')

<h1>Edit Post</h1>
<div role="separator" class="dropdown-divider"></div> 

<div class="form-row">
    <div class="form-group col-12 col-md-6">
      <label for="title">Post Title</label>
      <input type="text" autocomplete="off" class="form-control" id="title" name="title" placeholder="Your post title" value="{{$post_info->title}}" required>
      <span class="text-danger">{{ $errors->first('title') }}</span>
    </div>

    <div class="form-group col-12 col-md-6">
        <label for="slug">Slug</label>
      <input type="text" autocomplete="off" class="form-control" id="slug" name="slug" placeholder="Write post slug" value="{{$post_info->slug}}" required>
      <span class="text-danger">{{ $errors->first('slug') }}</span>
    </div>
</div>

<div class="form-row">
    <div class="form-group col-12 col-md-12">
        <label for="description">Post Description</label>
      <textarea class="form-control" id="description" name="description" placeholder="Enter a small description for your post" required>{{$post_info->description}}</textarea>
      <span class="text-danger">{{ $errors->first('description') }}</span>
    </div>


</div>


    <div class="badge badge-warning badge-pill">Message</div>
    <div role="separator" class="dropdown-divider"></div>

 <div class="form-row">
    <div class="form-group col-md-12">
        <textarea class="form-control" col="4" id="message" name="message">{{$post_info->message}}</textarea>
        <span class="text-danger">{{ $errors->first('message') }}</span>
    </div>
    @if($post_info->post_image)
    <img src="{{ asset('storage/' . $post_info->post_image) }}" class="img-thumbnail img-fluid blog-img">
    @endif
    <input id="post_image" type="file" class="form-control" name="post_image">

</div>

<input type="hidden" value="{{ Auth::user()->name }}" name="user">

  <button type="submit" class="btn btn-warning btn-block">Edit Post</button>

</form>

Answer 1

这一行是错误的：

Post::where('id', $id)->update($update);

因为where 返回一个 Eloquent Builder 对象，而不是代表您试图从数据库中获取的记录的模型实例...相反，您可以这样做：

Post::where('id', $id)->firstOrFail()->update($update); /* or Post::where('id', $id)->first()->update($update); if you are sure that the record is found */

或者如果id是主键：

Post::findOrFail($id)->update($update); /* or Post::find($id)->update($update); if you are sure that the record is found */

Answer 2

这解决了我的问题：

 public function update(Request $request, $id)
    {

        if ($request['post_image'] != '') {

            $request->validate([
            'title' => 'required',
            'description' => 'required',
            'slug' => 'required',
            'message' => 'required',
            'user' => 'required',
            'post_image' => 'image|mimes:jpeg,png,jpg,gif|max:2048'
            ]);

            $image_path = Storage::disk('public')->putFile('uploads/images', $request->file('post_image'));
            $request['image_path'] = $image_path;

            $update = [
                'title' =>$request->title,
                'description' =>$request->description,
                'slug' =>$request->slug,
                'message' =>$request->message,
                'user' =>$request->user,
                'post_image' =>$request->image_path];

        }else{

            $request->validate([
                'title' => 'required',
                'description' => 'required',
                'slug' => 'required',
                'message' => 'required',
                'user' => 'required'
                ]);

                $update = [
                    'title' =>$request->title,
                    'description' =>$request->description,
                    'slug' =>$request->slug,
                    'message' =>$request->message,
                    'user' =>$request->user];
        }  



            Post::findOrFail($id)->update($update);


        return Redirect::to('admin')->with('success','Great! Post updated successfully');

    }